Class 1:
Designed for use with NEMA Classes 12B and 12C cable trays. These systems have 1 1/8" wide side rail flanges and 4-hole splice plates.
Class 2:
Designed for use with NEMA Classes 20A, 20B and 20C cable trays. These systems have 2" wide side rail flanges and 4-hole splice plates.
Class 3:
Designed for use with NEMA Classes that exceed 20C. These systems have 2 3/8" wide side rail flanges and 8-hole splice plates.
